Points to Pounder for all types of Pipe lines
THE FREE FLOW SYSTEM |
THE DIRECT LINE SYSTEM |
THE RING MAIN SYSTEM |
| Used on large crude | Used on VLCC | Used on Product |
| Carriers | Carriers | |
| Carry only one garde | Carry two or three grade | Carry several |
| Of cargo | Of cargo | Different products |
| Large gate valve built in | Simple lines leading in the | |
| The bulkhead | Tanks | |
| Stern trim cause the oil | Due to straight length of | Due to the number of |
| To flow to the | Pipeline, there is better | Bends, joints and valve |
| Aftermost tank | Suction & less loss of | It take longer time |
| Pressure | ||
| Suction main cargo pump | Fewer valve & bends | Due to the number of |
| Situated in aft | Means less erosion & leak | Bends, joints and valve |
| Means more erosion & | ||
| Leaks | ||
| Less maintenance | More maintenance | |
| Required | Required | |
| Thorough washing of line is | Thorough washing of | |
| Not possible unless the | Line is possible without | |
| Washing are flushed into | Flushing into the tank | |
| The tank & discharged | ||
| From there | ||
| Due to fewer valves leaks | ||
| Are difficult to control | ||
| Valve segregation not | Required two valve | |
| Provided | Segregation | |
| Between products | ||
| The initial cost of fitting | The initial cost of | |
| Is less than ring main | Fitting is higher | |
|
System |
